from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To cause to resemble porphyry; to make spotted like porphyry.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To cause to resemble porphyry; to make spotted in composition, like porphyry.
from The Century Dictionary and Cyclopedia
- To cause to resemble porphyry.
- To grind with a muller upon a slab of porphyry, as painters' colors. Also spelled porphyrise.
Compare French porphyriser. (Wiktionary)